Stand-alone personal portable device for transmitting and receiving a computer file between two mobile physical people

ABSTRACT

The invention relates to a stand-alone portable device equipped with: a universal serial bus (USB) port ( 1 ) enabling the device to be temporarily connected to a personal computer (PC); a transmission system (emitter and receiver) ( 4 ) (with or without contact that ensures the confidentiality function); a memory ( 20 ) compartmentalized into a minimum of two areas (the emitting area ( 22 ) that secures the transmission and the receiving area ( 33 ) that ensures the storage function); a power supply system ( 40 ) that renders the device autonomous for the mobile mode, and; a voluntary system for controlling the transmission. The device permits the exchange of a computer file ( 222 ) between two physical people each having a compatible device. The file ( 222 ) to be sent is contained in the emitting memory area ( 22 ) of the device A and is transmitted (in its entirety) by the emitting system ( 4 ) to the receiving area ( 33 ) of a second device that receives and stores it (in its entirety), this being effect by a simple voluntary mechanical action.

The present invention relates to a standalone portable device equipped with a USB (Universal Serial Bus) port enabling the device to be connected to a PC (Personal Computer), a transmission system having sending and receiving functions (with or without contact), a non-volatile memory area accessible via the USB port and partitioned into a minimum of two areas (the sending area and the receiving area), a power supply system making the device standalone and a deliberate transmission control system. The device enables a computer file to be transmitted or received between two companies or individuals, each equipped with a compatible device. The file to be sent is contained in the sending memory area of the device. It is transmitted by the sending system, involving a deliberate action on the transmission control system, to the receiving memory area of a second device, if, and only if, the second device (then the receiver), accepts by a deliberate action the reception of the file. The received file is then stored (in full) in the receiving memory of the second device. This is a copy of the original file which remains available in the sending area of the sending device.

In the current state of information interchanges, it is almost understood that a computer file transfer is performed from one fixed PC terminal to another fixed PC terminal. For this, various techniques are available, either via the Internet or via an Ethernet, Bluetooth or Wireless type local area network. Mobile-solution based computer file transfers exist only via expensive PDA or mobile telephony type solutions. Not being equipped with a dedicated transmission or reception function key, or a sending memory area, or systems according to the invention, they involve complex procedures that are impossible to implement simply and quickly between two people. Furthermore, the file or information transmitted is often not retained in its entirety.

The object of the device according to the invention is to provide a technical solution that is simple to use. It is designed so that a computer file can be exchanged or transmitted when two individuals or companies meet on the move. The computer user is on the move when he is outside his fixed work base and is no longer in contact with his PC. The device according to the invention also allows received files to be stored temporarily and carried around until they are downloaded into a personal computer or into the corporate customer relations management (CRM) information network, when the user returns to his fixed base.

We do not at the present time know of any device equivalent to the invention that is available on the market or already the subject of a patent.

The appended drawings illustrate the invention:

FIG. 1 represents the various internal functions of the device that are necessary for its mode of operation. The arrows indicate the directions of movement of a file following: activation of the deliberate transmission control system, sending or receiving by infrared or the loading/unloading of files with the PC using the USB port.

FIG. 2 represents the various internal functions, of a variant of the device, that are necessary for its mode of operation. The arrows indicate the direction of movement of a file when sent following the activation of the deliberate transmission control system (the result of a male/female connection between two devices), and the operations of loading/unloading files with the PC using the USB port.

FIG. 3 represents two devices currently transmitting, according to the invention, equipped with “push-to-transmit” and “push-to-receive” keys enabling a file to be transmitted and received, and with an infrared-type transmission system.

FIG. 4 represents a variant of the device equipped with the “push-to-transmit” and “push-to-receive” keys, enabling a file to be transmitted and received, and with a male/female connection-type transmission system.

FIG. 5 represents a variant of the deliberate transmission control system, the functions of the keys giving the transmission or reception command being directly integrated in the transmission system based on a male/female type connection.

FIG. 6 represents a variant of the device equipped with a digital display which uses visual selection and an advanced key selection system to point to the file (marked) to be transmitted.

With reference to these drawings, the device according to the invention described hereinafter is resident in an electronic device in the compact format of a simple, market-standard “USB key”, and comprises the following various elements:

A USB serial port 1 for connecting the device to the USB socket on a PC. The PC then displays the content of a minimum of two separate memory areas 22 and 33 in which are stored, or distinctly marked, the main file 222 to be transmitted and the received files 333. The file 222 placed in the sending memory area 22 will be the file to be transmitted, the one received or placed in a receiving area 33 will be the received file 333, and it will be stored until it is processed. The user of the PC can thus place in the sending area 22 the file or files 222 that he wants, when he is on the move, to be able to transmit to a person having a compatible device. The user can retrieve the files 333 contained in the receiving area 33, in order to be able to use them, thanks to the direct access to the memory area 20 via the USB port once connected to his PC. The user can also place files to be stored in the receiving memory area 33. He must then create a folder containing the files to be stored, in order to avoid the risk of receiving a file that might have the same name and might overwrite a file already contained in the receiving memory area 33. Once connected to the PC, the memory areas 22 and 33 behave like external hard drives. The user can carry out the same operations as on any external hard drive (deleting, transferring, moving or copying the file or a folder containing files).

A built-in power source 40 providing the autonomy of the device once disconnected from the PC's USB port. This power source powers the device when transmitting or receiving a file. An on/off selection button can be added in order to save the power source. One of the buttons already available on the device can also perform this same function. In the case where the device is equipped only with a connection-based transmission system 4 incorporating the deliberate control system 15 and the recognition function 16 (FIG. 5), then the act of fitting together will automatically cause the device to be switched on. It will be switched off automatically when the transmission of the file is completed and at the end of a time delay. An indicator will indicate that the device is on.

Memory 20 which is the physical area in which computer files or folders will be placed and stored. The files can be of any of the following exemplary computer format types: file.doc; *.doc; file.jpg; *.*; *.Jce; *.wab; *.vcf, and so on. The files and the information contained in them will be stored in a hard-type non-volatile memory area (a component soldered onto the electronic circuit of flash memory type) or in a removable memory of the memory card type (for example: chip card, compact flash, SIM card, “secure digital card”). The memory 20 is partitioned into at least two areas: a sending memory area 22 containing the main file to be transmitted 222, and a receiving memory area 33. The latter can have a larger size because it will also serve as a file storage area. It can be accessed by PC, involving connecting the device via its USB port 1 to the PC's USB port. The sending memory area 22 also provides a security function guaranteeing to the user that another device can receive, according to the principle of the invention, only a file placed or marked or pointed to in a sending area. A file stored in the receiving area cannot be transmitted by the transmission system 4. The device can be equipped with other sending memory areas 55 associated with other keys 5, dedicated to selecting these areas, their modes of operation being based on the same logic. The loss of power supply does not affect the files contained in the memory 20. In the case where the device has the “advanced selection system based on pointing to the file to be transmitted” option, the memory no longer needs to be partitioned, so this option replaces the partitioned memory function.

A deliberate transmission control system (FIG. 1 and FIG. 3). This comprises a minimum of two function keys. One, called “push-to-transmit” 2, is intended for sending or transmitting a file located in the sending area 22. The other, called “push-to-receive” 3, is intended for receiving a transmitted file. A function of the preset “push-to-transmit” key 2 type will automatically select the main file 222 to be transmitted contained in the sending memory area 22 and give the command to the transmission system 4 to transfer the file into the receiving area 33 of another device after checking that the other device accepts the receipt of the file in its receiving area 33. It is the “push-to-receive” key that allows the file transmitted into its receiving memory area 33 to be loaded. When a user equipped with a device A meets another user equipped with a compatible device B, he can, if he wants, transmit his file by pressing the “push-to-transmit” key 2. The file 222 stored in the device A will then be transmitted into the receiving memory area 333 of the device B subject only to the condition that the user of the device B presses the reception key 3 of the device B at the same time. The deliberate act of pressing on the “push-to-transmit” key on the sending device automatically generates the prompt requesting agreement for transmission to the receiving device. The positive response of the receiver involving pressing the “push-to-receive” key constitutes and guarantees the deliberate action allowing the file to be transmitted and received. A third key 5 will be used to select another file 555 to be transmitted stored in a possible third sending memory area 55. The system can be equipped with a number of sending memory area selection keys.

Variant of the deliberate transmission control system having only a single transmission key to perform both “push-to-transmit” and/or “push-to-receive” functions. When a user equipped with a device having only a single key meets another user equipped with a compatible device, they can, if they wish, have a file transmitted. Then, it is the first device to press the function key that becomes the sender. The second device receiving the request signal is the receiver. The receiver can then if he wants, confirm in turn his desire to receive by pressing the key, thus validating the receiving mode. If the device receives no signal asking it for its agreement to receive, it is then that one which can become the sender on activating the key.

Variant of the deliberate transmission control system (FIG. 2, FIG. 4 and FIG. 5), when a user equipped with a device A meets another user equipped with a compatible device B, they can, if they want, have a file transmitted. The deliberate transmission control action is implemented by fitting the male USB port 1 of the sending device A into the female port 11 of the receiving device B or vice-versa. Fitting a male USB port 1 into a female USB port 11 between two compatible devices then corresponds to the deliberate action which automatically enables the main file to be transmitted. In the case where the device has no predefined function key, we will define for convention (FIG. 2 and FIG. 5) the direction from sending memory 22 corresponding to the male USB port 1 to receiving memory 33 corresponding to the female USB port 11 (see FIG. 2). The female USB port 11 of a device according to the invention has a function 16 for recognizing the presence of the male USB port 1 of another device. It is this recognition function 16 which enables the automatic transmission via the transmission control system 15. This male/female connection is equivalent (if the device does not have keys) to the manual command by pressing the “push-to-transmit” keys for the sending device A and the manual command by pressing the “push-to-receive” keys for the receiving device B. It also signifies acceptance to receive. The file 222 stored in the device A will then be automatically transmitted into the receiving memory area 333 of the device B the conditions involving the deliberate system and pressing on the deliberate transmission control system are fulfilled according to the invention. This is also true when the device B becomes the sender and the device A becomes the receiver. The act of male/female connection performed between two devices will then be considered as activation of the deliberate control system and as the activation command for the transmission system 4. Its operation corresponds to the deliberate action on transmission of the main file.

A coding/decoding system: in order to reduce the time to send the file on infrared transmission or reception, the file can be subjected to an encoding. The encoding can be performed before the file is loaded into the sending memory area 22, by the software, or during its infrared transfer. Once the file is received, the file will be decoded on the fly before it is stored in receiving memory 33, or later, once retrieved in the PC using the software that will be delivered with the device.

A transmission system 4 (FIG. 3 and FIG. 4): the transmission of the file or files contained in a device A or B is performed very simply by means of the systems that automate the file transfer. The mode of operation of the file transfer device is still dictated by a reciprocal deliberate action. The sender A can successfully transmit his file 222 only if the receiver B presses the “push-to-receive” key on his device at the same time. The key must be kept pressed throughout the duration of the transmission, and an indicator 6 will indicate the end of the transmission to him. Conversely, the receiver can retrieve the file originating from the sending device only if the sender wants to transmit the file to him. The sending or receiving of the file from or to the memory area is done between two compatible or identical systems. By turns, a device can become either sender or receiver. The file is transferred in its entirety, and is identical before and after the transfer. With the file transfer then needing to be performed with total confidentiality, certain wireless or Bluetooth transmission devices cannot be used for the transmission of the file. The file 222 can be transmitted by infrared link or by direct connection (fitting together thus becoming a transmission means 4). The file 222 is then transmitted from a device A and received by another device B and stored in the receiving area 33. The technology that constitutes the transfer system will be chosen to correspond to the criteria of simplicity, cost and confidentiality according to the invention. The two technologies that correspond to these criteria are either infrared link, or male/female mechanical fitting together. A transmission system by infrared link has the benefit of being contactless, being able to be compatible with other components equipped with infrared links, but will have a lower transmission bit rate. The second solution is of fitting together type; it can be used to create a transmission system 4 and, for this, requires a second female USB-type connection port 11, and the transmission speed will be considerably faster, but this type of mechanical connection can be considered less reliable when the device is used intensively.

An indicator 6 type information system which can be associated with the sending key “push-to-transmit” 2 and receiving key “push-to-receive” 3: the indicators will serve to inform the user that the transmitted file has indeed been received, that it has been transmitted correctly or that the system is currently transferring the file. In the case of a device equipped with a number of sending memory areas, the indicators can be used to show the memory area that has been selected for sending. The indicators can be replaced by a more powerful information system of digital display or touch screen type or simply be incorporated in the key by light key means.

Optionally, the device can be equipped with an advanced selection system (FIG. 6) with a digital display 17 and a button 18 for pointing (with visual selection) to the file to be transmitted. The file is then selected in the memory area 20, the digital display displays the name of the file that will be transmitted. The file selected using the selection button (or pointing button) 18 is the file to be transmitted 222. The device equipped with an advanced selection function and a display can dispense with having two separate memory areas. However, retaining two memory areas, a sending area 22 and the other a receiving area 33, simplifies searching for and pointing to the file to be transmitted and ensures the security function and confidentiality. The sender seeking to transmit only the file or files contained in the sending area 22. The other files contained in the storage and receiving area 33 possibly being confidential files. The selection (or pointing) system can also enable a file to be moved from the receiving memory area 33 to the sending memory area 22, or vice-versa.

Typical application of the invention: the aim of the device is the transmission or reception of files in a simple and fast way. An exemplary application can be indicated which is directly applicable to the device according to the invention: the transmission of a file containing the data corresponding to that of a paper business card. The data concerning a user can be stored in a computer file so as to be transmitted simply and rapidly between two people at a trade show or at a meeting. The information can be transmitted either in a direction (customer=device(A)→supplier=device(B)) or a direction (supplier=device(B)→customer=device(A)) or in both directions (customer(A)→supplier(B)→customer (A)). The third key 5 can be used to select another stored file 555 of sales brochure type, to be transferred at a business meeting.

Other products based on this technology can be built: one example is an interactive terminal intended for storing data between customers and suppliers, at trade shows. The files transmitted by the customers equipped with a device can be retrieved, either by infrared or by fitting together, in an interactive terminal-type medium operating according to the inventive mode of operation. The terminal will collect a set of files. The terminal can be standalone and can store the information in a “Compact Flash or Smart Flash” type removable disk medium. The data can be used directly by the company by reading the content of this storage memory disk. Its interpretation will be facilitated by operating software delivered with the device or with the interactive terminal using the inventive mode of operation. Another exemplary novel application: it is possible to imagine a printer having a female USB port 11 equipped with a function 16 for recognizing the device according to the invention. When the male USB port 1 of the device is fitted into the female port of the printer. The device would prompt for authorization to transmit then would transmit to the printer the file contained in its sending memory 22. The printer would then directly print this file without needing to switch on or load the file on the PC. The device can also be used in industry by a machine user to transmit the file corresponding to a production type to a machine control system.

Software, delivered with the device, will make it possible to incorporate the data contained in the files. This data, once loaded in the PC, can be returned and incorporated, to a customer relations management (CRM) network. The result is a productivity increase because, since the file contains the information, there is no need for a repeat input of the information before it is integrated into a CRM network. The associated software will make it possible to consult and display the stored files, sort them, and organize certain data types.

According to other characteristics, the system for encoding/decoding or encoding/code-converting the file on sending or on receiving, implemented by the device, is intended either to reduce the file transfer time, or to supply the file 222 to a proprietary system or receive the file arriving from a proprietary system, of cellphone type, in a format that can be read by the latter. On arrival, the file should contain all the information that it contains on departure and is received in its entirety. 

1-5. (canceled)
 6. The standalone portable personal device as claimed in claim 2, characterized in that the memory area consists of a hardwired type non-volatile memory (a component soldered on the electronic circuit of flash memory type).
 7. The standalone portable personal device as claimed in claim 30, characterized in that the memory area is partitioned into a minimum of two memory areas, one a sending area containing the main file to be transmitted, the other a receiving area, and in that the sending memory area guarantees the user the security and confidentiality function because the transmission system can transfer a file only if it originates from a sending memory area, the sending memory area simplifies searching for and pointing to the file to be transmitted, the receiving (or storage) memory area being intended to receive or store files.
 8. The device as claimed in claim 30, characterized in that it is equipped with an advanced selection system with digital display and button for pointing (with visual selection) to the file to be sent, said file is then selected (a digital display displays the name of the file) within the memory area or the sending memory area, the file selected using the pointing button is the file to be sent. Retaining two memory areas, one a sending area, the other a receiving area, simplifies searching for and pointing to the file to be transmitted and provides the security and confidentiality function, the sender wanting to transmit only the file or files contained in the sending area.
 9. The standalone portable personal device as claimed in claim 30, characterized in that the memory area consists of a removable memory card of SIM card, chip card, compact flash or other memory type behaving like an external hard drive.
 10. The standalone portable personal device as claimed in claim 30, characterized in that it has a deliberate transmission control system equipped with a “push-to-transmit” function key which sends a request for permission to transmit, which waits for the positive response from the receiving device and which, once this positive response is obtained, automates the functions for pointing to the main file to be transmitted contained in a memory area for sending and gives the command to a transmission system to transmit the file to the receiving device until its transmission is completed.
 11. The standalone portable personal device as claimed in claim 30, characterized in that it has a deliberate transmission control system equipped with a “push-to-receive” function key which validates the acceptance to receive in the storage memory area a file transmitted by another device. The sender can successfully transmit its file only if the receiver B at the same time presses on the “push-to-receive” key of his device. This action must be maintained throughout the duration of the transmission. The “push-to-receive” key automates the reception function, authorizing the reception of a file, sent by another identical or compatible device, by pointing to the memory area intended for reception and giving the command to a transmission system to receive the file and store it in the receiving memory area, the received computer file needing to conform in its entirety to the file sent.
 12. The standalone portable personal device as claimed in claim 30, characterized in that the deliberate transmission control system has a single key having and combining the same functions as “push-to-transmit” and/or “push-to-receive”. In this case, the first device to press the key is the sender and the second is the receiver.
 13. The transmission method as claimed in claim 29, characterized in that pressing on a preset function key is considered as an action giving permission to transmit a computer file between two devices and that it activates a deliberate transmission control system.
 14. A deliberate transmission control system for implementing the method as claimed in claim 29, characterized in that fitting the male USB port of the sending device A into the female USB port of the receiving device B, or vice-versa, is considered as a deliberate action giving permission to transmit a computer file between two devices by means of this fitting together then forming a transmission system.
 15. A recognition system for implementing the method as claimed in claim 29, characterized in that the deliberate transmission control system has a recognition system which replaces key-operated the deliberate transmission control system in the case where the device is equipped only with a male and female USB port forming the transmission control system then the recognition system gives the command to the deliberate control system to execute all the actions needed to transmit the file.
 16. The standalone portable device as claimed in claim 30, characterized in that the file transmission system (sender/receiver) is of infrared type. The transmission system is activated by one of the deliberate transmission control systems.
 17. A male USB port used for the device as claimed in claim 30, characterized in that it constitutes the sending part of the transmission system when it is used in the fitting of a male USB port into a female USB port of another device.
 18. A female USB port used for the device as claimed in claim 30, characterized in that it constitutes the receiving part of the transmission system when it is used in the fitting of a male USB port into a female USB port.
 19. The standalone portable device as claimed in claim 30, characterized in that the fitting of the male USB port of the sending device A into the female USB port of the receiving device B, or vice-versa, is considered to then form a transmission system.
 20. The standalone portable device as claimed in claim 30, characterized in that the device has no predefined function key and that the fitting of the male USB port of the sending device A into the female USB port of the receiving device B, or vice-versa, is considered as a deliberate action giving permission to transmit, then we define for convention the transmission direction from sending memory corresponding to the male USB port to ---> receiving memory corresponding to the female USB port. The possible reverse direction of transmission is also claimed but does not correspond to the direction defined for convention.
 21. The standalone portable device as claimed in claim 30, characterized in that, if the device has the “advanced selection system by pointing to the file to be transmitted” option, the memory area no longer needs to be partitioned, this option replaces the partitioned memory function.
 22. The standalone portable device as claimed in claim 30, characterized in that the transmission system can transmit a computer file from the memory only if the device is equipped with an “advanced selection system” making it possible to select, mark or point to the file to be sent. If the device is not so equipped, it can transmit only a file originating from the sending memory area. The device cannot transfer a file contained in the receiving memory.
 23. The standalone portable personal device as claimed in claim 30, characterized in that it comprises: a USB port, a non-volatile storage memory accessible via the USB port comprising a sending memory area and a receiving memory area, a standalone power supply system, a transmission control system comprising a “push-to-transmit” sending key and/or a “push-to-receive” receiving key, a sending/receiving transmission system of infrared type and the operating mode of which responds to a deliberate action maintained on the transmission key, of a first device A, which looks for the file contained in the sending memory area and sends it by transmission into the receiving memory area of a second device B if and only if the second device accepts the reception of the file by an action maintained on the reception key, on the deliberate transmission system. The file, according to the principle of the invention, is transmitted in its entirety, it contains after its transfer all the information contained before its transfer, unaltered.
 24. The standalone portable personal device for implementing the method as claimed in claim 29, characterized in that it comprises: a male USB port and a female USB port, a non-volatile storage memory accessible via the USB port comprising a sending memory area and a receiving memory area, a standalone power supply system, a transmission control system comprising a “push-to-transmit” sending key and a “push-to-receive” receiving key, a transmission system implemented by fitting together, i.e. a male/female mechanical fitting together made by means of a second connection port with female USB type contact. The transmission is conducted by fitting the male USB port of the sending device A into the female USB port of the receiving device B, or vice-versa. The male/female connection made between two devices will then be considered as the transmission system. The mode of operation responds to a deliberate action maintained on the “push-to-transmit” transmission key, of the device A, which looks for the file contained in the sending memory area and sends it by transmission into the receiving memory area of a second device B if and only if the second device accepts the reception of the file by means of a deliberate action maintained on the reception key. The file, according to the principle of the invention, is transmitted in its entirety. After its transfer, it contains all the information that it contained before its transfer, unaltered.
 25. The standalone portable personal device for implementing the method as claimed in claim 29, characterized in that it comprises: a male USB port and a female USB port, a non-volatile storage memory accessible via the USB port comprising a sending memory area, a receiving memory area, a standalone power supply system, a transmission system formed by fitting together, a transmission control system characterized by the automatic detection of the connection of the male USB and female USB ports and automatically giving the file transfer command to the transmission system, produced by fitting together. The transmission is conducted by fitting the male USB port of the sending device A into the female port of the receiving device B, or vice-versa. The fitting of the male USB port into the female USB port of two devices then corresponds to the deliberate mechanical action which automatically makes it possible to transmit the main file in the direction (main sending memory) corresponding to the male USB port to ---> (receiving memory) corresponding to the female USB port. The female USB port of a device according to the invention has a function for recognizing the presence of the male USB port of another device. This male/female fitting together is equivalent to the manual command by pressing on the “push-to-transmit” key for the sending device A and the manual command by pressing on the “push-to-receive” key for the receiving device B. The file stored in the device A will then be transmitted automatically into the receiving memory area of the device B the conditions of the deliberate system and of pressing on the transmission control system are fulfilled according to the invention. The file according to the principle of the invention is transmitted in its entirety. It contains, after its transfer, all the information that it contained before its transfer, unaltered.
 26. The standalone portable personal device for implementing the method as claimed in claim 29, characterized in that it comprises: a male USB port and a female USB port; a storage memory, a standalone power supply system, a control system comprising a sending key and a receiving key, an advanced selection system with digital display and button for pointing (with visual selection) to the file to be sent, a transmission system produced by fitting together, and the mode of operation of which is then to select the file to be transmitted (the digital display displays the name of the file) within the memory area. The file selected using the pointing button is then the file to be sent. Then, the activation of the transmission control system proceeds to send the file selected by the advanced selection system. Even with the advanced selection system, the retention of two memory areas, one a sending area, and the other a receiving area, simplifies searching for and pointing to the file to be transmitted and provides the security and confidentiality function, the sender wanting to transmit only the file or files contained in the sending area.
 27. The standalone portable personal device as claimed in claim 30, characterized in that the file can be subjected to a conversion, involving a coding/code conversion on transmission or on reception performed by the device, and intended either to reduce the transfer time, or to supply the file to a proprietary system or to receive the file arriving from a proprietary system, of mobile telephone type, in a format that can be read by the latter. This file should contain on arrival all the information that it contained on departure, and is received in its entirety.
 28. The standalone portable personal device designed to transfer computer files as claimed in claim 30, characterized in that it comprises a standalone power supply which is switched on by fitting together, the fitting of a male USB port into a female USB port, or vice-versa, will automatically activate the switching on of the device, it being switched off automatically after the end of the transmission of the file and after the end of a time delay.
 29. A standalone portable device for transferring of computer files, the standalone portable device comprising: a non-volatile storage memory partitioned into a sending area provided to contain a file to be sent, and a receiving memory area solely for receiving or storing files; a standalone power supply; a transmission system comprising means of receiving a file in the receiving memory area, the means of receiving including a female USB-type contact connection port, and means of sending a copy of a file to be sent, the means of sending including a male USB-type contact connection port able to fit mechanically into a female USB port of a second identical device, the male USB port giving access to the storage memory; a transmission control system to enable or disable a transmission of a computer file to or from the second identical device; characterized in that the deliberate transmission control system has a system for recognizing the mechanical fitting, respectively, of a male USB port of the second device in the female USB port of the first device or of the male USB port of the first device in a female USB port of the second device, so that the recognition of such a fitting together automatically triggers, respectively, the reception of a file, originating from the sending memory area of the second device, in the receiving memory area of the first device, or the sending of a copy of the file, stored in the sending memory area of the first device, to the receiving memory area of the second device.
 30. The standalone portable device as claimed in claim 29, characterized in that the storage memory comprises a hard-type non-volatile memory, that is, a component soldered onto the electronic circuit of flash memory type.
 31. The standalone portable device as claimed in claim 29, characterized in that the storage memory consists of a removable memory card of SIM card, chip card, compact flash or other type behaving like an external hard drive.
 32. The standalone portable device as claimed in one of claim 29, characterized in that the file to be sent is subject to encoding or code conversion.
 33. The standalone portable device as claimed in one of claim 29, characterized in that the standalone power supply is automatically started up by the mechanical fitting of a male USB port into the female USB port of the device, or of a female USB port with the male USB port of the device, and in that it is stopped automatically after the end of the transmission of the file and after a time delay. 